Listing C.A.V.-Willard battery numbers selected by Mr. Royce for the Goshawk and 40/50 HP cars.
| Identifier | WestWitteringFiles\F\May1921\ Scan33 | |
| Date | 1st May 1921 | |
| To E.S. from E. {Mr Elliott - Chief Engineer} Copy to Messrs. " [illegible] " DAV. " HS. {Lord Ernest Hives - Chair} " HY. {Tom Haldenby - Plant Engineer} ORIGINAL E F C 2 JUN 1921 RECEIVED E2/G31/5/21. RE BATTERIES FOR "GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II" AND 40/50 H.P. C.A.V.-WILLARD TYPE. In accordance with your request, we send you herewith the numbers of the batteries selected by Mr. Royce of the C.A.V.-Willard pattern for our two sizes of cars:- 12XR3 - 40/50 H.P. and 40 H.P. 12XR2 - "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) I and II". E. {Mr Elliott - Chief Engineer} | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).